EP4310249A1 - Durchscheinende papierprodukte - Google Patents

Durchscheinende papierprodukte Download PDF

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Publication number
EP4310249A1
EP4310249A1 EP22185880.6A EP22185880A EP4310249A1 EP 4310249 A1 EP4310249 A1 EP 4310249A1 EP 22185880 A EP22185880 A EP 22185880A EP 4310249 A1 EP4310249 A1 EP 4310249A1
Authority
EP
European Patent Office
Prior art keywords
pulp fiber
microfibrillated cellulose
paper
mixture
translucent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22185880.6A
Other languages
English (en)
French (fr)
Inventor
Alba SANTMARTI
Maria Giulia DAL FARRA
Giorgio COMANDE
Rick CLAESSEN
Farouk AYADI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sappi Netherlands Services BV
Original Assignee
Sappi Netherlands Services BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sappi Netherlands Services BV filed Critical Sappi Netherlands Services BV
Priority to EP22185880.6A priority Critical patent/EP4310249A1/de
Priority to PCT/EP2023/069434 priority patent/WO2024017751A1/en
Publication of EP4310249A1 publication Critical patent/EP4310249A1/de
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D21H11/18—Highly hydrated, swollen or fibrillatable fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/005—Mechanical treatment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/06—Vegetable or imitation parchment; Glassine paper

Definitions

  • the present invention relates to translucent paper, and a process for making a translucent paper.
  • polymer films are used frequently because of their transparency and because of their barrier properties such as grease and oil barrier properties.
  • the transparency of the polymer films is advantageous in that it enables the package to be partially transparent, so that the packaged food can be seen prior to purchase and unpacking.
  • barrier properties prevent the contents of a packaging to exude or leak across the polymer film.
  • Glassine is a smooth and glossy paper that is air, water, and grease resistant to some extent. It is also translucent and manufactured by supercalendering: after pressing and drying, the paper web is passed through a stack of alternating steel- and fiber-covered rolls of the supercalender at the end of the paper machine so that the paper fibers flatten facing in the same direction. It is mostly used as release liner or as a wrapping paper for non-food applications, and generally has properties that are deemed insufficient for food packaging.
  • MFC microfibrillated cellulose
  • pure microfibrillated cellulose film cannot be reasonably manufactured on a paper machine without extensive hardware adjustments and additional machinery, because if the furnish comprising essentially only microfibrillated cellulose is deposited on the moving woven mesh of the paper machine to create a continuous web of microfibrillated cellulose, it is challenging to drain the furnish of its water because of the water retention associated with microfibrillated cellulose.
  • WO2011/068457A1 relates to a process for producing a paper or paperboard product, the process of which comprises the steps of providing a furnish comprising fibers, adding starch to the furnish, adding microfibrillated cellulose to the furnish, provide the furnish to a wire in order to form a web, wherein the starch and microfibrillated cellulose (MFC) is added separately to the furnish in an amount 2 to 15% by weight, and 1 to 15% by weigh, respectively.
  • MFC microfibrillated cellulose having more than 80 SR can be obtained before addition to the furnish by refining, enzymatically treating with endoglucanases, refining and microfluidizing bleached chemical hardwood pulp. Transparency was not addressed in WO2011/068457A1 .
  • EP 2 861 800 B1 relates to a method for producing a release base paper, the method comprising the steps of manufacturing a release base paper with a paper-making furnish having a fiber freeness (Canadian Standard Freeness, CSF) of 180 ml or higher; pressing the furnish into a web of paper; drying the pressed web; and calendering the web to form a release base paper, wherein the release base paper is manufactured with nano-fibrillated cellulose added to the release base paper by means of at least one of: (i) incorporation into the furnish at a loading concentration of from about 10 to about 400 lbs/ton; and (ii) coating on the web of paper at a coating rate of about 0.2 to about 12 g/m.
  • CSF Canadian Standard Freeness
  • WO2017/168353A1 relates to a process for the production of a film comprising the steps of: providing a suspension comprising microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is at least 60 weight-% based on the weight of solids of the suspension; adding nanoparticles to said suspension to provide a mixture of said microfibrillated cellulose and said nanoparticles, wherein the amount of nanoparticles added is at least 1.0 kg on dry basis per ton of dry solids of the suspension; providing said mixture to a porous wire to form a web; and dewatering said web to form an intermediate thin substrate or film, and where the suspension may comprise a mixture of different types of fibers, such as microfibrillated cellulose, and an amount of other types of fiber, such as kraft fibers, fines, reinforcement fibers, synthetic fibers, dissolving pulp, TMP or CTMP, PGW, etc.
  • the suspension may comprise a mixture of different types of fibers,
  • EP 2 122 053 B1 relates to a method for manufacturing a sheet of natural tracing paper having an opacity index of less than 40%, measured according to ISO 2469 standard, characterized in that it comprises the following successive steps of a. an enzyme preparation containing cellulases is reacted with an aqueous suspension of paper pulp, the fibrous composition of which comprises at least 50% by dry weight of virgin cellulosic fibers, b. after an enzymatic action time on said pulp of at most 60 minutes, the enzymatic action of cellulases on said paper pulp is inhibited using a chemical inhibitor,c. the paper pulp obtained in step b) is mechanically refined to a Schopper-Riegler degree above 80, d. said refined pulp is drained on the wire cloth of a paper machine, e. the sheet thus formed is dried so as to obtain said sheet of tracing paper.
  • EP 2 122 053 B1 is silent on microcellulose addition to the furnish.
  • SR Schopper-Riegler
  • translucent paper in the context of the present invention relates to paper having a transmittance of at least 50%, when measured on three samples according to DIN 53147 measured on a Technidyne ColourTouch PC using light source C.
  • SR Schopper-Riegler
  • pulp fibers having high Schopper-Riegler values of are not habitually used, because of the large energy consumption to refine the pulp fibers to such SR values.
  • the pulp refined to high Schopper-Riegler values is preferable as this leads to the manufacturing of paper with a lower opacity.
  • microfibrillated cellulose is often added into the furnish to increase the strength and mechanical properties of paper. It should also be noted that adding higher amounts of microfibrillated cellulose into the furnish makes the process of dewatering more challenging.
  • the paper with high translucency can be obtained by mixing medium to highly refined pulp fibers with SR values equal or higher than 50, with the microfibrillated cellulose.
  • the mixture of the pulp fiber and the microfibrillated cellulose has a Schopper-Riegler (SR) between 65 and 95 SR.
  • the translucent paper according to the invention is characterized with the transmittance of 60% of more, preferably of 65% or more, more preferably of 70% or more, according to DIN 53147 when measured on a Technidyne ColourTouch PC using light source C.
  • the pulp fiber comprised in the base paper layer of the translucent paper according to the present invention may be from any commercially available wood pulp, such as for example mechanical wood pulp, thermomechanical wood pulp, or chemithermomechanical wood pulp, chemical wood pulp, recycled wood pulp, or organosolv wood pulp. Examples of such pulps are sulfite pulp, kraft pulp or soda pulp.
  • the wood pulp fiber may be partly or fully replaced by other plant pulps sourced from non-woody plants such as from bamboo, bagasse, kenaf, coconut, straw, grass, and others, having the same degree of Schopper-Riegler (SR).
  • SR Schopper-Riegler
  • the wood pulp fiber is chemical wood pulp fiber, such as kraft or sulphite wood pulp fiber, and preferably is bleached chemical wood pulp fiber.
  • the pulp fiber comprised in the base paper layer of the translucent paper according to the present invention may be hardwood pulp such as from acacia, aspen, birch, eucalyptus, maple, pacific albus or rubber tree, and may be softwood pulp such as from pine or spruce.
  • the wood pulp fiber of the base paper layer may be a mixture of hardwood pulp fiber and softwood pulp fiber.
  • the addition of softwood contributes positively to the strength of the paper.
  • the wood pulp fiber of the base paper layer may be a mixture of hardwood pulp fiber and softwood pulp fiber, wherein the hardwood pulp fiber is comprised in the mixture of hardwood pulp fiber and softwood pulp fiber in an amount of 50 weight percent, or more, preferably of 75 weight percent or more.
  • the wood pulp fiber of the base paper layer may be a mixture of hardwood pulp fiber and softwood pulp fiber, wherein the softwood pulp fiber in an amount of 50 weight percent, or less, preferably of 25 weight percent or less.
  • the average fiber length of pulp fibers is between 900 to 1400 micrometers, according to ISO 16065, preferably between 900 and 1100 micrometers.
  • the average fiber length before refining for the mixture of 80% of hardwood and 20% of softwood is between 1000 and 1400 micrometers. After the refining of that pulp to SR>50 the fiber length is between 900 and 1100 micrometers.
  • the wood pulp fiber of the base paper layer may be a bleached wood pulp, such as for example beached chemithermomechanical pulp (BCTMP), southern or northern bleached softwood kraft pulp (SBSK/NBSK).
  • the base paper layer of the translucent paper according to the present invention may further comprise, beyond wood pulp fiber and microfibrillated cellulose, other materials that are commonly used in papermaking, such as for example fillers, such as calcium carbonate, clay or kaolin, sizing agents such as starch, in particular cationic starch, or rosin.
  • Further wet end additives include defoaming agents, biocidal agents, and dewatering aids.
  • the base paper layer does not comprise fillers such as calcium carbonate, clay or kaolin, since such filler increase opacity, and reduce transparency.
  • the translucent paper further comprises carboxymethyl cellulose.
  • microfibrillated cellulose comprised in the base paper layer of the translucent paper according to the present invention may be obtained from any commercially available pulp fiber source, such as for example from wood pulp, and in particular from hardwood pulp. However, microfibrillated cellulose may also be sourced from bacteria.
  • microfibrillated cellulose is a term well-known in the field of paper engineering.
  • the microfibrillated cellulose comprised in the base paper layer of the translucent paper according to the present invention has a degree of Schopper-Riegler of at least 95SR, and more preferably of more than 100SR.
  • the wood pulp fiber comprised in the base paper layer of the translucent paper according to the present invention has a degree of Schopper-Riegler (SR) of more than 50SR, preferably of more than 65 SR, more preferably of more than 70 SR.
  • SR Schopper-Riegler
  • the wood pulp fiber in the base paper of the translucent paper according to the present invention has a degree of Schopper-Riegler (SR) of more than 50SR, preferably of more than 65 SR, more preferably of more than 70 SR, with the proviso that the degree of Schopper-Riegler (SR) of the wood pulp fiber of the mixture of wood pulp fiber and microfibrillated cellulose is smaller than the degree of Schopper-Riegler (SR) of the mixture of wood pulp fiber and microfibrillated cellulose.
  • SR Schopper-Riegler
  • the wood pulp fiber of the base paper layer may have a degree of Schopper-Riegler (SR) of between 50 to about 95, preferably of 50 to about 90, more preferably of 65 to 90 and even more preferably of 70 to about 90.
  • SR Schopper-Riegler
  • the wood pulp fiber of the base paper layer may have a degree of Schopper-Riegler (SR) of between 73 to 83.
  • the translucent paper has a preferably density of more than 1.1 g cm -3 , preferably of more than 1.2 g cm -3 , as measured according to ISO 534.
  • the wood pulp fiber and microfibrillated cellulose are combined in the form of a mixture of wood pulp fiber and microfibrillated cellulose, and in said mixture of pulp fiber and microfibrillated cellulose, the microfibrillated cellulose is comprised in an amount of 10 weight percent to about 50 weight percent, based on the combined weight of the mixture of pulp fiber and microfibrillated cellulose of the mixture.
  • the mixture of wood pulp fiber and microfibrillated cellulose comprises at least 40% fines.
  • Fines are pulp fibers having have a fibre length of less than 200 micrometers, as measured according to ISO 16065.
  • the wood pulp fiber and microfibrillated cellulose are combined in the form of a mixture of wood pulp fiber and microfibrillated cellulose, and in said mixture of pulp fiber and microfibrillated cellulose, the microfibrillated cellulose is comprised in an amount of 10 weight percent to about 30 weight percent, more preferably in an amount of 10 weight percent to about 15 weight percent, based on the combined weight of the mixture of pulp fiber and microfibrillated cellulose of the mixture.
  • the wood pulp fiber and microfibrillated cellulose are combined in the form of a mixture of wood pulp fiber and microfibrillated cellulose, mixture of pulp fiber and microfibrillated cellulose has a degree of Schopper-Riegler (SR) of between 65 SR and 95 SR, preferably of between 70 SR and 90 SR, as measured under ISO 5267-1.
  • SR Schopper-Riegler
  • the overall degree of Schopper-Riegler (SR) of the mixture of wood pulp fiber and the microfibrillated cellulose will be increased by the addition of microfibrillated cellulose, when compared to the degree of Schopper-Riegler (SR) of the wood pulp fiber alone, which has generally a degree of Schopper-Riegler (SR) of more than 50SR, but of less than the overall degree of Schopper-Riegler (SR) of the mixture of wood pulp fiber and the microfibrillated cellulose.
  • the mixture of wood pulp fiber and the microfibrillated cellulose is free of enzymes.
  • the grammage of the base paper layer is preferably between 25 and 100 gsm, preferably between 30 and 60 gsm.
  • the translucent paper according to the present invention may comprise a coating layer to add a desired functionality to the base paper layer.
  • the translucent paper according to the present invention may comprise a coating layer comprising a polymer or copolymer of vinyl alcohol, preferably in combination with a carboxymethyl cellulose.
  • said coating layer may have a areal weight of about from 0.5 gsm to 20 gsm, or 0.5 gsm to about 1.5 gsm.
  • the packaging item may be any suitable type of packaging such as for example a box, envelope, or bag.
  • the packaging item may be a food packaging such as a food wrapping, food tray, food box, food bag, separating sheet for cheese or cured meat slices, liquid cup or food container.
  • the packaging item comprises a window element made of such a translucent paper or the packaging item or food packaging item according to the present invention may be formed entirely from such a translucent paper.
  • the process further comprises the step of rewetting the dry base paper layer to form a rewetted base paper layer, the step of keeping the rewetted base paper wet, and the step of (super) calendaring.
  • the rewetted base paper layer in the step of rewetting, has a water content of about from 10 weight percent to about 30 weight percent, and more preferably of from 15 to 25 weight percent, and even more preferred of from 18 to 22 weight percent, based on weight of the rewetted base paper layer.
  • the base paper layer in the step of keeping the rewetted base paper wet, is kept wet for at least 2 hours, preferably for at least 4 hours, or for 4 to 8 hours, more preferably for at least 6 hours, or for 6 to 8 hours, i.e. for the time between rewetting and (super)calendaring steps.
  • the rewetted and (super)calendared base paper layer is dried again to yield the final translucent paper.
  • the nip pressure of the (super)calendar is of from 0.00028 kN/mm 2 to 0.0012 kN/mm 2 and the temperature of the (super)calendar of at least 90 °C, and preferably of at least 100°C.
  • (Super)calendaring allows to densify the rewetted base paper layer and leads to a translucent paper having a higher transmittance according to DIN 53147. It was found that when a rewetted base paper layer is supercalendared, an increase in transmittance of 25 to 35% was achieved as compared to (super)calendaring the base paper layer without rewetting, thus significantly increasing the transparency.
  • Example 1 shows different pulp mixture recipes (Table 1) that were used for the manufacture of translucent paper and illustrates how the degree of pulp refining, % fines and %fibril area, and the amount of MFC can influence paper properties such as density and transparency and also shows the effect of calendaring on one hand increasing the density and on the other hand transparency of paper (Table 2).
  • Table 1 List of pulp mixtures used to make paper. Each pulp mixture has a distinct Schopper-Riegler (SR) value and distinct fiber morphology.
  • SR Schopper-Riegler
  • SR Schopper-Riegler
  • Sample A is a pulp mixture consisting of a mix of softwood and hardwood pulp that was refined to a specific refining energy of 180 kWh/t to achieve a SR of about 50.
  • the hardwood constituted the larger part by weight of the mixture.
  • Paper produced from this furnish had a density of 0.68 g/cm 3 and a transmittance of 48%. After post-processing of this paper by rewetting, aging and supercalendering, the density of this paper increased to 1.09 g/cm 3 and transmittance to 62%.
  • sample D which corresponds to a a fibrous mixture of 90 wt.% furnish C refined to a SR of 78 + 10 wt.% MFC.
  • the mixture of both components has a SR of 83.
  • the addition of MFC also leads to an increase in density and therefore in transparency.
  • Example 2 shows the effect of MFC in improving paper formation.
  • 50 gsm papers made from fibre sample C (100 wt.% of pulp refined to 320 kWh/t) and from fiber sample D (90 wt.% of pulp refined to 320 kWh/t + 10 wt.% MFC) were compared in terms of their formation index.
  • Table 3 shows that the addition of MFC leads to an improvement in formation as well as a paper with less quantity and smaller size of the fiber flocs. This is thought to be due to the negative surface charge of MFC, which makes it act as a dispersing agent and thus contributes to a better dispersion of the larger and less refined pulp fibers. A better formation seems to lead to increased paper density and therefore increased paper transparency.
  • Figure 2 shows images of paper manufactured from refined pulp furnish without MFC added (sample C) and from paper manufactured from refined pulp furnish with 10 wt.% MFC loading (sample D).
  • Example 3 shows the effect of adding different amounts of MFC to less refined pulp fibers in paper transparency.
  • a pulp mixture consisting of HW and SW was refined using a lab scale refiner to achieve a SR 78.
  • Different amounts (7.5, 15, 25, 30 wt%) of MFC were added to the refined pulp and paper with a grammage of 50 gsm was manufactured from these mixtures using a pilot scale paper machine.
  • Figure 1 shows that paper transparency increases with higher amounts of MFC.
  • Example 4 shows the effect of adding MFC to less refined pulp fibers in increasing paper grease resistance.
  • the same pulp mixture consisting of HW and SW refined using a lab scale refiner to achieve a SR 78 as in Example 3 was used.
  • Different amounts of MFC (7.5, 15, 25, 30 wt%) were added to the refined pulp and uncoated paper with a grammage of 50 gsm was manufactured from these mixtures using a pilot scale paper machine.
  • Figure 3 shows that the addition of MFC leads to an increase in grease resistance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
EP22185880.6A 2022-07-19 2022-07-19 Durchscheinende papierprodukte Pending EP4310249A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22185880.6A EP4310249A1 (de) 2022-07-19 2022-07-19 Durchscheinende papierprodukte
PCT/EP2023/069434 WO2024017751A1 (en) 2022-07-19 2023-07-13 Translucent paper products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22185880.6A EP4310249A1 (de) 2022-07-19 2022-07-19 Durchscheinende papierprodukte

Publications (1)

Publication Number Publication Date
EP4310249A1 true EP4310249A1 (de) 2024-01-24

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Family Applications (1)

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EP22185880.6A Pending EP4310249A1 (de) 2022-07-19 2022-07-19 Durchscheinende papierprodukte

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EP (1) EP4310249A1 (de)
WO (1) WO2024017751A1 (de)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030226656A1 (en) * 2001-06-01 2003-12-11 Junji Harada Total heat exchanging element-use paper
JP2011074535A (ja) * 2009-09-30 2011-04-14 Nippon Paper Industries Co Ltd 耐油紙
WO2011068457A1 (en) 2009-12-03 2011-06-09 Stora Enso Oyj A process for production of a paper or paperboard product
WO2014147295A1 (en) * 2013-03-20 2014-09-25 Ahlstrom Corporation Fibrous substrate containing fibers and nanofibrillar polysaccharide
EP2861800B1 (de) 2012-06-15 2017-02-15 University of Maine System Board of Trustees Trennpapier und verfahren zur herstellung
WO2017168353A1 (en) 2016-04-01 2017-10-05 Stora Enso Oyj Process for production of film comprising microfibrillated cellulose
EP2122053B1 (de) 2006-12-22 2019-01-09 Arjowiggins Verfahren zur herstellung von pergamentpapier
WO2021224839A1 (en) * 2020-05-07 2021-11-11 Stora Enso Oyj Coated paper substrate suitable for metallization
US20220153477A1 (en) * 2019-02-22 2022-05-19 Gimsa S.R.L. Recyclable composite material, in particular for food packaging

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030226656A1 (en) * 2001-06-01 2003-12-11 Junji Harada Total heat exchanging element-use paper
EP2122053B1 (de) 2006-12-22 2019-01-09 Arjowiggins Verfahren zur herstellung von pergamentpapier
JP2011074535A (ja) * 2009-09-30 2011-04-14 Nippon Paper Industries Co Ltd 耐油紙
WO2011068457A1 (en) 2009-12-03 2011-06-09 Stora Enso Oyj A process for production of a paper or paperboard product
EP2861800B1 (de) 2012-06-15 2017-02-15 University of Maine System Board of Trustees Trennpapier und verfahren zur herstellung
WO2014147295A1 (en) * 2013-03-20 2014-09-25 Ahlstrom Corporation Fibrous substrate containing fibers and nanofibrillar polysaccharide
WO2017168353A1 (en) 2016-04-01 2017-10-05 Stora Enso Oyj Process for production of film comprising microfibrillated cellulose
US20220153477A1 (en) * 2019-02-22 2022-05-19 Gimsa S.R.L. Recyclable composite material, in particular for food packaging
WO2021224839A1 (en) * 2020-05-07 2021-11-11 Stora Enso Oyj Coated paper substrate suitable for metallization

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